Home / 81,032.40-121,548.60-76,658.40

Finding the Fourth Proportional to 81,032.40, 121,548.60 and 76,658.40

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Solution

The fourth proportional to 81,032.40, 121,548.60 and 76,658.40 is: 114,987.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,032.40 : 121,548.60 = 76,658.40 : x
  2. Step 2: Convert to fraction form
    81,032.40/121,548.60 = 76,658.40/x
  3. Step 3: Cross multiply
    81,032.40x = 121,548.60 × 76,658.40
  4. Step 4: Simplify right side
    81,032.40x = 9,317,721,198.24
  5. Step 5: Solve for x
    x = 9,317,721,198.24/81,032.40
  6. Step 6: Final answer
    x = 114,987.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.